Brush structure



Patented Mar. 4, 1930 UNITED STATES PATENT OFFICE n HENRY CAVE, F HARTFORD, CONNECTICUT, AssIGNoR To THF FULLER BRUSH COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION oF CONNECTICUT BRUSH STRUCTURE Application filed February rIhis invention relates to the articles above mentioned, and an object of my invention, among others, is the provision of meansv for causing the bristles or similar material compressed in a brush structure to flare Outwardly to a maximum degree.

One form of structure embodying my invention and in the construction and use of which the objects herein set out, as well as 1o others, may be attained, is illustrated in the accompanying drawings, in which- Figure 1 is a side view of a brush'strip embodying my invention.

Figure 2 is a view in cross section through the'same.

Figure 3 is a side view of one form of brush that may be produced from my improved brush strip.

Figure t is a face view of the same.

When the bristles are gripped between the sides of a sheet metal channel section they may not flare outwardly as much as desired, the gripping of the channel sides against the bristles tending to hold them together above the channel so that the brush area presented by the bristle ends is comparatively small.

l In some types of brushes this may be desired, but the present invention, according to one of its features, is directed to an improved structure with a brush area at the bristle ends which is comparatively large. A channel strip 4 is preferably formed, as by rolling, from a strip of sheet metal, into channel shape to receive bristles 5. These may be supplied in any suitable manner in the process of manufacture and may be placed within the channel in various ways. In the preferred form of structure these bristles are doubled or folded wthin. the channel and a core strip 6 is located within the fold, this core strip having an important function in the manufacture of brushes by some of the methods employed in such construction.

It being desired to provide a sufficient spread for the bristles so that a surface of the required area shall exist at the ends of the bristles, it has occurred to me that by giving a proper shape to the sides of the channel strip in connection with the core this result may be attained.

1, 1926. `Serial No. 85,108.

I have, therefore, so shaped the sides 7 of the channel strip at or adj acentto the mouth 8 of said channel that the bristles will be directed across to the opposite side of the mouth and across the edge of the opposite side of the channel piece, and while the core 5 will aid in producing this result, the principal agent exists in the sides of the channel piece andthe form given to them.

In effecting my purpose, the bristles are preferably divided into small groups or masses 9, each of which isprojected from 'one side of the structure through the interval 'between two groups or masses projecting from the other side Vof the structure. If it be 'desired to produce a compact, continuous surface at the outer endsof the bristles these groups or masses of bristles will be of minimum'size, and this may in many forms of brushes be the desired structure. It may, however, infsome forms of brushes be desired to impart a tufted form to thel brush body, and in such case theA bristles may be disposed in masses or groups of considerable size. f

The sides of the channel piece present in cross section a curve more or less regular from one edge around to the opposite edge, and in order to attain the best results I so construct this curve lthat the tangent at each edge willl project across the opposite edge of the channel piece so that the bristles will be bent to project from one side of the channel piece across to the opposite side and in contact with the edges of such opposite side. The mass of bristles is consequently flared from the channel strip outwardly to the ends of the bristles, whereby the area of the brush structure at the ends of the bristles is increased and maintained to produce a brushing surface of the extent required.

These brush strips of indefinite length may be cut to shorter lengths as may be re- ?uired for the making of brushes of various Orms, one of the many forms being shown in Figures 3 and 4 of the drawings in which the short lengths of a strip are doubled or bent backwardly with the ends, devoid of bristles, closed together and inserted in a handle 10. Other forms may be given to the short strips or lengths to produce brushes of any particular type that may be desired.

In accordance with the provisions olf the patent statutes I have described the principlesV of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the device shown is only illustrative and that the invention'may be carried out by such other means and applied to uses other than those above set out and as deiined by the appended claims'. Y

I claiml. A brush structureincluding a channelstrip having sides forming a Lconstricted mouth, and bristles secured and crossed within the channel and projecting through said mouth, the sides of said channel .outside of and adjacent said mouth being lared outT wardly to'for'm a side support for bristles extending from the opposite side of the channel strip.

2. A brush structure :including a channelstrip comprising sides forming a constricted mouth, bristles folded within and projecting from said mouth, a core strip located within the folds of said bristles and spaced a distance inwardly of the mouth to permit rcrossing of the bristles within the channel adjacent the mouth, and said mouth flaring outwardly to support bristles extending from the opposite side of the channel strip, v

3. A brush structure including a channel strip havingconverging sides forming a constricted mouth, and bristles divided into in,- dependent groups secured within the chan.- nel with the extended portions of the groups crossed' and projecting through said mouth, the sides of said channel outside of and ad.-

jacent said mouth being flared outwardly toorm a side support for bristles extending from the opposite side of the strip.

4. A brush structure including a channel Strip comprising converging sides forming a constricted mouth, bristles divided into in,- dependent groups folded within and proj ect.- ing from said mouth, a core strip located within the folds of said bristles and spaced a distance inwardly of the mouth to permit crossing of the extended portions of the grouped bristles within the channel adjacent the mouth, and said mouth Haring outwardly to support bristles extending from the op.- Poste Side 0f. the Channel Strip,

HENRY'QAVE. 

